Tuned mass damper systems application for chong qi bridge girder sections to reduce vortex shedding induced vibration
This paper presents a practical project example for the successful application of 32 Tuned Mass Dampers(TMDs)to the Chong Qi Bridge in China(total length 7km-main bridge span 944 m)to reduce vortex shedding induced oscillations of the bridges girder sections(section span 184 m).The application of such devices is a beneficial alternative to aerodynamic and aeroelastic optimization of the bridge deck by increasing structural damping to reduce the vertical dynamic response for the case that vortices shed off with a frequency that corresponds with the fundamental vertical bending frequency of the bridge.While aerodynamic measures only shift the critical wind speed for which these resonance effects occur,passive TMDs reduce the bridges dynamic response.In detail,this contribution describes the TMD concept and the realized optimization of the Tuned Mass Damper units to achieve an optimum reduction effect.Results of work shop tests will be presented as well as the experimental dynamic analysis of several bridge segments that has been performed during the commissioning of the TMD.This analysis included the determination of the bridges relevant vibration modes and the corresponding structural damping from ambient vibration tests,especially the damping values of the bridge are within the scope of interest to verify the optimum performance of the applied TMD systems.
TMD bridge oscillation optimum reduction effect
Peter Nawrotzki C.Meinhardt Xuejun Yin Jianli wang Yong Luo
GERB vibration control system,Berlin,Germany GERB(Qingdao)Vibration Control Co.Ltd.,Qingdao,China
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
1162-1173
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）